Highlighting the harmonic regime generated by electric locomotives equipped with DC motors

International Conference on Applied Sciences 2017

Baciu, I.^1 ; Cunan, C.D.^1

Politehnica University of Timisoara, Department of Electrical Engineering and Industrial Informatics, 5 Revolution Street, Hunedoara

331128, Romania^1

关键词: Apparent power;    Current harmonics;    Current voltage;    Graphical representations;    Harmonic frequency;    Power factors;    Power quality analyzer;    PSCAD/EMTDC;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/294/1/012050/pdf
DOI  :  10.1088/1757-899X/294/1/012050

来源: IOP

【 摘 要 】

The paper presents the results of measurements made using the C.A. 8334 power quality analyzer on an electric locomotive equipped with DC motors. We carried out determinations of the current-voltage regime using a locomotive motor. The harmonic regime of the other motors being identical to the analysed one, we could easily deduce the effects caused by the entire locomotive. The data measured with the analyzer were firstly transferred into a computer system using the Qualistar software, followed by data processing in Excel, enabling therefore a graphical representation of the characteristic parameters of power quality. Based on the acquired data, we determined the power factor, as well as the active, reactive and apparent power. The measurements revealed high values of the current harmonics, fact that required some measures to be taken for reducing the values of these harmonics. For this, we ran a simulation using the PSCAD/EMTDC software, by introducing LC filters in tune with the harmonic frequencies. The result was a significant reduction in the harmonic regime, either in the harmonics values or the power factor and reactive power.